Paint applicator



Aug. 22, 1967 N. T. LAZAR PAINT APPLICATOR 5 Sheets-Sheet 1 Filed Jan. 13, 1967 INVENTOR Nathan T. Lazar ATTORNEYS Aug. 22, 1967 N. T. LAZAR PAINT APPLICATOR Filed Jan. 13, 1967 3 Sheets-Sheet 2 Fig. 4.

(I visa 65 Fig. 5.

INVENTOR Nothon T. Lazar BY flgvwyfiZwz/n ATTORNEYS United States Patent 3,336,615 PAINT APPLICATOR Nathan T. Lazar, 386 Pleasant Ave., New Milford, NJ. 07646 Filed Jan. 13, 1967, Ser. No. 628,184 14 Claims. (Cl. 1529) ABSTRACT OF THE DISCLOSURE A paint applicator unit for applying paint to a first surface at the intersection of the first surface with a second surface, including a rotating paint applicator and a drive mechanism for rotating the application, the drive mechanism being actuated by engagement with either the surface to be painted or the second surface. The applicator unit also includes wipers for smoothing the paint surface and guides for maintaining the unit a predetermined distance away from the second surface and the surface to be painted.

This application is a continuation-in-part of application Ser. No. 481,802, filed on Aug. 23, 1965.

This invention relates to a unit for applying a liquid to a surface and more particularly to a paint applicator for painting a wall surface contiguous to another wall surface thereto without transferring paint to the latter wall surface. The invention has particular utility for painting the vertical walls of a room next to the ceiling. Numerous paint rollers have been developed for this purpose, however, such rollers have been unsatisfactory from many standpoints. The primary disadvantage is that the paint builds up on the edge of the roller, or on the edge of the paint applicator. Additionally, any such paint rollers have been designed to be utilized by those having a high degree of professional skill.

The present invention overcomes the above objection to provide a paint applicator usable by those skilled or unskilled users and which enables the user to paint a vertical wall next to a ceiling along a straight line without staining or marking the ceiling with paint.

A further object of this invention is to provide an improved paint applicator whereby the applicator in contact with the surface is in a continuous rotary motion thereby minimizing the build up of the paint along the edges of the applicator.

A further object of my invention is to provide an improved paint applicator which may be moved along a wall surface contiguous with another wall surface with minimum effort on the part of the user to maintain the applicator in continuous contact with the first wall surface.

- A still further object of my invention is to provide a paint applicator which takes into consideration slight variations of the wall surface being painted with respect to the wall surface contiguous thereto.

Still other objects of my invention will become apparent from the following description when taken in conjunction with the following drawings in which:

FIG. 1 is a top view of an embodiment of the paint applicator unit of my invention;

FIG. 2 is a partial cross sectional view of the paint applicator of my invention taken along the lines 2--2 of FIG. 1;

FIG. 3 is a side view of the paint applicator of FIG. 1;

FIG. 4 is a cross-sectional side view of the applicator taken along the lines 4-4 of FIG. 2;

, FIG. 5 is a partial top view of the paint applicator taken along the lines 5-5 of FIG. 2 illustrating the floating means of the applicator to adjust for variations between one wall surface and the wall surface contiguous thereto.

FIG. 7 is a bottom view of the applicator unit of FIG. 6; and

FIG. 8 is a cross-sectional side view of the applicator taken along lines 7-7.

Referring to FIGS. 1 to 5, there is provided a paint applicator unit, generally indicated at 10, including a body portion 11. The body portion 11 is generally a rectangular shape having a top surface 12, a bottom surface 13, parallel side surfaces 14, and parallel side surface 15 of greater length than side surfaces 14. Centrally positioned within the body 11, there is provided a substantially square-shaped opening 16 formed of side walls 17 parallel to end surfaces 15, and of side walls generally indicated as 18 parallel to end surfaces 14. The side walls 18 include stepped side wall portions 18a, 18b and of decreasing width from the top surface 12 to the bottom surface 13, as more clearly shown in FIG. 2, thereby forming shoulder portions 19a and 19b between side wall portions 18a and 18b, and 18b and 180, respectively.

Positioned within the opening 16 of the body 11 is a spring loaded assembly, generally indicated as 20, in cluding a body portion 21 having top surface 22, bottom surface 23, end surfaces 24 parallel to end surfaces 15 of the body 11, and end surfaces 25 including outwardly extending shoulder portions 25a. The end surfaces 25 are parallel to the end surfaces 14 of the body 11. The body portion 21 is provided with a rectangularly shaped opening 21a as more fully hereinafter described. The shoulder portions 250 are formed centrally of the body 21, as more clearly shown in FIG. 2. The shoulder portions 25a are positioned on the shoulder portion 19b and are free to move within the opening 16 in parallel relationship to the end surfaces 14 of the body 11. Mounted within the opening formed between the top surface 12 of the body 11, the upper end surfaces 25 of the body 21, the side wall portion 18a, and shoulder portions 191:, there is provided rectangularly shaped rods 26 affixed to body 11, such as by screws 27 as shown in FIG. 5. The contacting surfaces 25 of the assembly 20 and the contacting surfaces 18 and 19 of the body 11 may be formed of a suitable bearing material to permit the assembly 20 to move slidably within the opening 16.

Mounted to the upper surface 12 of the body 11, there is provided a generally ring-shaped handle support member, generally indicated as 30, including a body portion 31 having a top surface 32, a bottom surface 33, an inner circular surface 34, and an outer circular surface, generally indicated as 35.

Positioned about the surface portions 35a and 35b and surface 36, there is provided a ring-shaped handle mount, generally indicated as 37. The handle mount 37 includes top surface 38, bottom surface 39 outer surface 40, and inner surface generally indicated as 41. The inner surface 41 includes surface portions 410 and 41b. The surface portion 41b is of greater diameter than 41:11 thereby forming an intermediate shoulder portion 42 perpendicular to the plane of surface 41. The surfaces 35b, 36 and 35a of the handle support member 30 are in slidable contact with the surfaces 41b, 42 and 41a of the handle 37, respectively, and permit the handle mount 37 to rotate about the handle support member 30 in a plane parallel to the plane of the upper surface 12 of the body 11.

Additionally, the bottom surface 39 of the handle mount 37 is in contact with the upper surface of the body 11. The contacting surfaces between the handle mount 37, and the handle support member 30 and the upper surface 12 of the body 11 may be provided with a suitable bearing means to permit the handle mount 37 to freely rotateabout the handle support member 30. The handle mount 37 is positioned on the surface 12 of the body 11 and the handle support member 30 is positioned and affixed to the body 11, such as by screws 43.

The handle mount 37 is provided with cylindrical openings 44 which are disposed at either end of a diameter of the ring-shaped handle mount 37. The openings 44 may extend through the handle mount 37 from outer surface 40 to inner surface 41. A handle 45 formed of a suitable material, including body portion 46 and J-shaped end portion 47 is affixed to the handle mount 37 by inserting the smaller legs 47a of the J-shaped end portion 47 into the openings 44 of the handle mount 37. Cupshaped retainers 48 may be afilxed intermediate the leg portions 470: of the handle 45 which engage the outer surface 40 of the handle mount 37 thereby restricting the depth to which legs 47a may be inserted into the openings 44. In this manner, the legs 4711 are prevented from contacting the surface 35b of the handle support member 30, which would restrict free rotational movement of the handle mount 37 about the handle support member 30.

Extending through the body 11 parallel to end surfaces 14 and intermediate top and bottom surfaces 12 and 13, there is provided a transverse bore 50. Extending through the assembly 20 parallel to end surfaces 25 and intermediate the top and bottom surfaces 22 and 23, there is provided a transverse bore 51 which is in co-axial alignment with the bore 50 of the body 11. Within the bores 50 and 51 and extending beyond one of the surfaces 15, there is provided a shaft 52. The bores 51 and 52 may be provided with a suitable bearing means (not shown) to permit the shaft 52 to rotate and longitudinally move within the bores 50 and 51, as more fully hereinafter described.

A spring 53 is positioned on the shaft 52 and is disposed between and against the surface 24 of the assembly 20 and against the body 11 through a large countersunk bore 50a as shown in FIG. 5. The assembly 20 in the operative position is held by spring 53 against one of the sides 17 of the opening 16. Mounted to the portion of the shaft 52 extending beyond the bore 50 of the body 11, there is provided a generally circular-shaped disc 54 having a friction band 55 formed of a suitable material, such as rubber or the like material. Affixed and perpendicular to the shaft 52 and positioned within the opening 21a of the assembly 20 there is provided a bevel gear 56.

Mounted to the bottom surface 23 of the assembly 20 or formed as an intergral part of the assembly 20, there is provided a shaft 57 extending perpendicularly downward from the surface 23 of the assembly 20. The lower portion of the shaft is provided with a circular groove 58, the plane of such circular groove 58 being perpendicular to the axis of the shaft 57.

Mounted for rotational movement about the shaft 57, there is provided a paint applicator assembly, generally indicated as 60, including a cylindrical-shaped body 61 having a bore 62 centrally disposed within the body 61, the axis of the bore 62 being in coaxial alignment with the axis of the cylinder body 61 and the axis of the shaft 57.

On the upper circular surface of the body 61, a cylindrical-shaped countersunk opening 63 is formed to receive a bevel gear 64 which is affixed to the body 61 by suitable means (not shown). The axis of the bevel gear 64 is in coaxial alignment with the bore 62 of the body 61. The paint applicator assembly 60 is positioned on the shaft 57 and held in place by a clip 65 which is inserted within the groove 58 of the shaft 57. The bevel gear 64 of the assembly 60 is caused to mesh with the bevel gear 56 affixed to shaft 52. The circular surface of the paint applicator assembly 60 opposite the surface including the bevel gear 64 is provided about its periphery with bristles 66 or like material suitable for the application of a surface coating, such as paint, and mounted in a conventional manner. The outer cylindrical surface of 4 the body 61 may be provided with friction band 67, such as rubber or like material.

Mounted to the bottom surface 13 of body 11, there are provided rectangularly shaped wiper assemblies, generally indicated as 70. The wiper assemblies 70 include a body portion 71 formed of parallel side surface 72, parallel side surfaces 73 of greater length than side surfaces 72, a bottom surface 74, and a top surface 75. The top surface 75 of the assembly 70 is afiixed to the bottom surface 13 of the body 11 by suitable means, such as by an adhesive. The side surfaces 72 of the body 71 are positioned coincident with the surfaces 15- of the body 11. A side surface 73 of the assembly 70 opposite the side surface 73 adjacent the paint applicator assembly 60, is positioned coincident with the side surface 14 of the body 11. Extending from the bottom surface 74 of the wiper assemblies 70, there are provided a plurality of bristles 76 or like material mounted to the body 71 by conventional means and suitable for the application of a surface coating, such as paint.

Positioned on the upper surface 12 of the body 11 are guide assemblies, generally indicated as 80, mounted to the surface 12 in a suitable manner, such as with an adhesive. A guide assembly 80 includes an L-shaped body 81 as more particularly shown in FIG. 3. The body 81 includes a smaller leg portion 82 and a large leg portion 83. The leg portion 83 is provided with a bore 84 the axis of which is parallel to the axis of the shaft 57. Received within the bore 84 is a shaft or pin 85 upon which a roller 86 is provided. The drawing illustrates two guide assemblies 80 being mounted to the upper surface 12 of the body 11, however, it will be understood that one or more guide assemblies may be provided.

The following is a description of the embodiment of FIGS. 15, when used for painting a wall surface contiguous with a ceiling. A surface coating material, such as paint or the like, is applied to the bristles 66 of the applicator assembly 60. The paint applicator 10 is placed in position with the rollers 86 of the guide assemblies 80 and the friction means 67 of the paint applicator 60 contacting the ceiling. The bristles 66 of the applicator assembly 60, the bristles 76 of the wiper assemblies 70, and the friction band 55 of the disc 54 are placed in contact with the wall. The paint applicator 10 is then caused to move laterally across the wall surface. As the assembly moves across the wall, the band 67 of the applicator assembly 60 frictionally engages the ceiling causing the body 60 to rotate about the shaft 57. T o insure for more uniform distribution of the paint, the friction band 55 of the disc 54 also frictionally engages the wall causing the disc 54 and shaft 52 to rotate thereby turning the bevel gear 56. Since the bevel gear 56 is meshed with the bevel gear 64, the applicator assembly 60 is further caused to rotate as the paint applicator 10 traverses across the surface of the wall to be painted. It will be appreciated that for more uniform application there is three-point contact with the ceiling. Additionally, it is understood that the surfaces of the bristles of the applicator assembly 60 and wiper assemblies 70 are substantially in the same plane.

By proper selection of the gearing ratio for the bevel gears 56 and 64, the applicator assembly 60 will rotate with the same angular displacement as if the applicator assembly 60 had not been provided with a friction band 67. As the applicator 10 sweeps across the surface to be painted, the body 60 rotates and uniformly applies paint to the surface. The Wiper assembly 70 following the applicator 60 (depending on which direction the assembly is being moved, i.e. left to right, or right to left, with a ceiling and wall being the reference point) remove excess paint and provides for a more finished painted or coated surface. Additionally, by the action of the assembly 20, the applicator 60 is permitted to move laterally parallel to the axis of the bores 51 and 52 thereby taking into consideration variations or undulations between the two contiguous wall surfaces.

While I have described the operation of the paint applicator of the embodiment of FIGS. 1-5 as one where paint or like covering material is applied to the bristles 66 of the assembly 60, it is contemplated that the assembly 20 may be provided with a bore 91 which is disposed from the top surface 22 through the main body portion 21, terminating at the lower surface of the shaft 57, as shown in FIG. 2. An appropriate fitting 92 may be inserted, as by threading into the top portion of the bore 91 for connecting a tubing by suitable means (not shown). A spray head 93 may be inserted, such as by threading into the terminal portion of the bore 91 at the end of the shaft 57. In this manner, a surface coating material, such as paint or the like, may be passed under pressure through the bore 91 to the inner area of the body 60 surrounded by the bristles 66 to permit continuous coat ing of the wall surface without the need for removing the applicator to apply additional amounts of the coating material. It will be appreciated that many modifications may be made to the embodiment of FIGS. 1-5, however, any such modifications will nevertheless result in a paint applicator capable of accomplishing the desired result of cutting or painting one wall surface which is contiguous another wall surface. For instance, the circular disc assembly 55 including the bevel gears 56 and 64 may be eliminated for certain applications. Additionally, the applicator need not be provided with a wiper assembly 70, or a guide assembly 80, again depending upon the intended use. The embodiment shown and described is particularly suited for painting or covering surfaces whereby a finished surface results which is acceptable for home decoration. On the other hand, where industrial applications do not require a high degree of finished surfaces, the applicator may be modified to include fewer features, however, providing an acceptable result.

Additionally, the paint applicator may be modified by having the rollers 86 formed in a manner for line contact, and the assemblies 80 being adjustable so as to permit the coating of one surface which is not necessarily perpendicular to the wall surface adjacent that which is being painted. For example, by adjusting the guide assemblies 80 vertically upwards, when referring to FIG. 1, the paint applicator could cover a wall surface which has an angle greater than ninety degrees from the reference surfaces, such situation being found in houses having cathedral ceilings.

'Further, it is contemplated that the applicator assembly 60 including the positioning of the bristles may be square-shaped or rectangularly shaped, and rigidly affixed to the body 10 in a manner whereby the assembly 60 does not rotate about the shaft 56. In this context the assembly 60 would be provided with guide means to contact the contiguous wall surface. One skilled in the art will appreciate that some or all of the contacting surfaces'may be provided with suitable bearing materials to permit such contacting surfaces to move freely with respect to one another.

Referring now to FIGS. 6 to 8 there is provided another embodiment of the paint applicator unit, generally indicated as 100, including a hollow rectangular body portion 101. The body portion 101 is comprised of -a top wall 102, parallel front and rear walls 103 and 104, respectively, parallel side walls 105 and 106 of less length than front and rear walls 103 and 104, and bottom wall 105, the walls forming a rectangular chamber 107.

The top wall 102 of the applicator unit 100 is provided with a pair of wheels 108 and 109 which function to both rotate a paint applicator and position the applicator unit as hereinafter described. The wheels 108 and 109 are rigidly mounted on shafts 111 and 112, respectively, which extend through the top wall 102, chamber 107 and are rotatably supported on the inner surface 113 of the 6 bottom wall'105. The shafts 111 and 112 are positioned so that the outer circumference of wheels 108 and 109, which are provided with friction bands 114 formed of a suitable material, such as a rubber, extend beyond the outer surface of rear wall 104. The friction bands 114 are adapted to engage a wall or ceiling adjacent the wall to be painted.

A gear 115 is rigidly mounted on shaft 111 within the chamber 106 and a gear 116 is rigidly mounted on shaft 112 within the chamber 107. The gears 115 and 116 en gage a gear 117 located within the chamber 107 and rigidly mounted on shaft 118. The shaft 118 is rotatably supported on the inner surface 119 of top wall 102 and is positioned equidistant between side walls and 106 and closer to the rear wall 104 than the front wall 103. The gears and 116 engage the gear 117 so that when wheels 108 and 109 are rotated in one direction, the shaft 118 is rotated in a first direction and when the wheels 108 and 109 are rotated in the opposite direction the shaft 118 is rotated in a second direction.

The shaft 118 extends through chamber 107 and bot-v tom wall 105 and has mounted thereon a paint applicator, generally indicated as 121. The paint applicator 121 has a convex bottom surface and a frustoconical shape, with the outer circumference thereof extending beyond the outer surface of rear wall 104. The paint applicator 121 may be made of any material suitable for applying a liquid material, such as paint to a surface preferably a porous sponge-like, resiliently deformable material, for example a polyurethane foam. A pair of rectangular shaped wipers 125 are mounted on the bottom wall 105 by a suitable means, such as screws 126 and extend along the entire length of side walls 105 and 106, respectively. The wipers 125 are positioned so that the bottom surfaces 127 thereof are in the same plane as the bottom surface of applicator 121. The wipers 125 may be comprised of a material similar to the material of the paint applicator 121 and function to both apply liquid to a surface and to smooth and even the liquid that has been applied to the surface. Wipers 128, comprised of a generally horizontal surface 129, located in the same plane as the bottom surface of the applicator 121, and an inclined surface 131, are mounted on the bottom wall 106, for example by a suitable paste or glue. The wipers 128 which are formed of a sponge-like, resiliently deformable material abut against the applicator 121 and function to remove excess liquid, such as paint, therefrom.

The paint applicator unit 100 is provided with a three point movable support comprised of a pair of small wheels 132 and a larger wheel 133 which are adapted to engage the surface to be painted. The wheels 132 and wheel 133 also function to maintain the paint applicator unit a predetermined distance away from the surface to be painted. The wheels 132 are rotatably supported on pins 134 mounted on threaded rods 135, the threaded portion of the rods 135 being received in bolts 136 mounted on the bottom wall 105, adjacent the rear wall 104.

The larger wheel 133 is rotatably supported on an arm 137 which is connected to the paint applicator unit 100 by a bolt 138 which is received in a nut 139 rigidly mounted on the front wall 103 about equidistant between the side walls 105 and 106.

The paint applicator unit 100 is further provided with a handle 141 for manipulating the unit. The handle is pivotally connected to the top wall 102 by a ball 142 which is received in a socket (not shown) centrally positioned in the top wall 102.

In operation, the paint applicator 121 is dipped into paint and the paint applicator unit 100 positioned on a wall to be painted at the intersection of the wall with a second wall or ceiling. The friction bands 114 on the outer circumference of wheels 108 and 109 abut against the second wall and the paint applicator 121, wheels 132 and larger wheel 133 abut against the wall to be painted. The paint applicator unit 100 is moved along the wall to be painted by means of the handle 141. The friction bands 114 mounted on the wheels 108 and 109 frictionally engage the second wall and the wheels are rotated by the movement of the paint applicator unit 100. The Wheels 108 and 109 rigidly mounted on shafts 111 and 112, respectively, rotate the shaft 118 through gears 115, 116 and 117 thereby rotating the paint applicator 121 and applying an even coat of paint to the first wall.

It is to be understood that numerous modifications of the embodiment illustrated in FIGURES 68 are also possible. Thus, for example, the wipers 125 may be mounted on the body 101 other than as described. Thus, for example the bottom wall 105 may be provided with suitable channels which are adapted to receive the wipers 125. Thus, the Wipers 125 may be readily replaced by simply removing the wipers from the channels. This modification and numerous other modifications should be apparent to those skilled in the art from the teachings contained herein.

It will be understood that the embodiments of the invention set forth above are illustrative only and that various changes in the steps, materials and arrangements of parts may be made by those skilled in the art within the scope of the invention as defined in the claims appended hereto.

What is claimed is:

1. An applicator unit for applying a liquid material to a first surface in the vicinity of the intersection of said first surface and a second surface comprising: a means for applying a liquid to said first surface, drive means to effect rotational movement of said means for applying liquid, said drive means including means to engage said second surface so as to effect the rotational movement as the applicator unit is moved.

2. The applicator as claimed in claim 1 and further comprising a body, said means for applying liquid being connected to said body, another means for applying liquid to said first surface, said another means for applying liquid being connected to said body.

3. The applicator as claimed in claim 2 and further comprising a shaft connected to said body, said means for applying liquid being rigidly mounted on said shaft, said drive means rotating the shaft and the means for applying liquid.

4. The applicator as claimed in claim 3 and further comprising a handle means pivotally connected to said body to manipulate the applicator unit.

5. The applicator unit as claimed in claim 1 further comprising a body, a first shaft rotatably mounted on said body, said means for applying a liquid being rigidly mounted on said first shaft, a first gear means mounted on said first shaft, and said drive means further including a second shaft, a second gear rotatably mounted on said second shaft, said second gear engaging said first gear, and said means for engaging said second surface including a means mounted on said second shaft which frictionally engages said second surface, said means frictionally engaging the second surface rotating the second shaft and thereby rotating the means for applying the liquid through the second gear, the first gear and the first shaft when the applicator unit is moved.

6. The applicator as claimed in claim 5 wherein said means mounted on the second shaft for frictionally engaging said second surface is a wheel.

7. The applicator unit as claimed in claim 6 and wherein the drive means further includes a third shaft rotatably mounted on said body, a third gear mounted on said shaft,,said third gear engaging said first gear, and said means for engaging said second surface further includes another wheel mounted on said third shaft frictionally engaging said second surface, said another wheel being rotated when the applicator unit is moved thereby 8 rotating said means for applying the liquid through said third shaft, the third gear, the first gear and the first shaft.

8. The applicator as claimed in claim 6 wherein said means for applying a liquid has a frustoconical crosssection, the outer circumference of said means for applying a liquid extending beyond the outer surface of said body.

9. The applicator unit as claimed in claim 6 wherein the means engaging said second surface maintains the applicator unit a predetermined distance away from said second surface.

10. The applicator unit as claimed in claim 1 and further comprising support means, said support means engaging said first surface and maintaining the applicator unit a predetermined distance away from said first surface.

11. An applicator unit for applying a liquid material to a first surface in the vicinity of the intersection of such first surface and a second surface, which comprises:

(a) a first assembly including a first painting means;

and

(b) a second assembly, connected to the first assembly,

including a second painting means for applying liquid material to said first surface as a portion thereof engages said second surface and controls the distance between said second painting means and said surface intersection, and drive means connected to said second painting means to effect rotational motion of said second painting means, said drive means including means to engage one of said surfaces so as to effect the rotational motion of said second painting means as the applicator unit is moved parallel to said surface intersection.

12. The applicator as claimed in claim 11 and further comprising guide means connected to said first assembly, said guide means adapted to engage said second surface to control the distance between the applicator unit and the intersection.

13. The applicator as claimed in claim 11 wherein said drive means includes, a drive shaft means coupled to said second painting means and rotatably mounted in said first assembly, and drive wheel means coaxially mounted on said drive shaft means and adapted to engage said first surface so as to effect rotational movement of said second painting means as the applicator unit is moved parallel to said surface intersection.

14. An applicator for applying a liquid material to a first surface in the vicinity of the intersection of such first surface and a second surface which comprises:

(a) a first assembly including a first painting means for applying liquid material to said first surface, and a guide means adapted for engagement with said second surface so as to control the distancebetween said first painting means and said intersection; and

(b) a second assembly connected to said first assembly including a second painting means for applying liquid material to said first surface as a portion thereof engages said second surface and controls the distance between said second painting means and said surface intersection, and drive means connected to said second painting means to effect rotational motion of said second painting means as the applicator unit is moved parallel to said surface intersection.

References Cited UNITED STATES PATENTS 370,335 11/1907 Apple 15 50 1,919,854 7/ 1933 Masseau. 2,989,763 6/1961 Bradley 15-50 CHARLES A. WILLMUTH, Primary Examiner.

E. L. ROBERTS, 111., Assistant Examiner. 

1. AN APPLICATOR UNIT FOR APPLYING A LIQUID MATERIAL TO A FIRST SURFACE IN THE VICINITY OF THE INTERSECTION OF SAID FIRST SURFACE AND A SECOND SURFACE COMPRISING: A MEANS FOR APPLYING A LIQUID TO SAID FIRST SURFACE, DRIVE MEANS TO EFFECT ROTATIONAL MOVEMENT OF SAID MEANS FOR APPLYING LIQUID, SAID DRIVE MEANS INCLUDING MEANS TO ENGAGE SAID SECOND SURFACE SO AS TO EFFECT THE ROTATIONAL MOVEMENT AS THE APPLICATOR UNIT IS MOVED. 